Condensed Consolidating Statement Of Cash Flows (Details) (USD $) | 3 Months Ended |
Mar. 31, 2015 | Mar. 31, 2014 |
Condensed Consolidating Financial Statements [Line Items] | | |
Net cash provided (used) by operating activities | ($15,835,000) | $5,264,000 |
CASH FLOWS FROM INVESTING ACTIVITIES: | | |
Investment in property and equipment | -6,804,000 | -3,015,000 |
Proceeds from sales of assets | 1,592,000 | 8,703,000 |
Equity method investments | -1,921,000 | -3,379,000 |
Purchases of investments, employee benefit plans | -1,089,000 | -890,000 |
Proceeds from sales of investments, employee benefit plans | 925,000 | 281,000 |
Issuance of mezzanine and other notes receivable | 0 | -587,000 |
Collections of mezzanine and other notes receivable | 105,000 | 68,000 |
Other items, net | -77,000 | -154,000 |
Net cash provided (used) by investing activities | -7,269,000 | 1,027,000 |
CASH FLOWS FROM FINANCING ACTIVITIES: | | |
Net borrowings pursuant to revolving credit facility | 20,700,000 | 15,000,000 |
Principal payments on long-term debt | -3,082,000 | -2,052,000 |
Purchases of treasury stock | -6,227,000 | -4,530,000 |
Dividends paid | -11,710,000 | -10,784,000 |
Excess tax benefits from stock-based compensation | 4,473,000 | 1,024,000 |
Proceeds from exercise of stock options | 5,619,000 | 1,547,000 |
Net cash provided (used) by financing activities | 9,773,000 | 205,000 |
Net change in cash and cash equivalents | -13,331,000 | 6,496,000 |
Effect of foreign exchange rate changes on cash and cash equivalents | -1,004,000 | 587,000 |
Cash and cash equivalents at beginning of period | 214,879,000 | 167,795,000 |
Cash and cash equivalents at end of period | 200,544,000 | 174,878,000 |
Parent [Member] | | |
Condensed Consolidating Financial Statements [Line Items] | | |
Net cash provided (used) by operating activities | -20,715,000 | 4,252,000 |
CASH FLOWS FROM INVESTING ACTIVITIES: | | |
Investment in property and equipment | -4,712,000 | -1,359,000 |
Proceeds from sales of assets | 0 | 0 |
Equity method investments | 0 | 0 |
Purchases of investments, employee benefit plans | 0 | 0 |
Proceeds from sales of investments, employee benefit plans | 0 | 0 |
Issuance of mezzanine and other notes receivable | | -587,000 |
Collections of mezzanine and other notes receivable | 105,000 | 68,000 |
Advances to and investments in affiliates | 0 | -1,000,000 |
Proceeds from Sale of Other Assets, Investing Activities | 0 | |
Other items, net | -77,000 | -154,000 |
Net cash provided (used) by investing activities | -4,684,000 | -3,032,000 |
CASH FLOWS FROM FINANCING ACTIVITIES: | | |
Net borrowings pursuant to revolving credit facility | 20,700,000 | 15,000,000 |
Principal payments on long-term debt | -2,813,000 | -1,875,000 |
Proceeds from contributions from affiliates | 0 | 0 |
Distributions to affiliates | 0 | |
Purchases of treasury stock | -6,227,000 | -4,530,000 |
Dividends paid | -11,710,000 | -10,784,000 |
Excess tax benefits from stock-based compensation | 0 | 0 |
Proceeds from exercise of stock options | 5,619,000 | 1,547,000 |
Net cash provided (used) by financing activities | 5,569,000 | -642,000 |
Net change in cash and cash equivalents | -19,830,000 | 578,000 |
Effect of foreign exchange rate changes on cash and cash equivalents | 0 | 0 |
Cash and cash equivalents at beginning of period | 25,290,000 | 9,785,000 |
Cash and cash equivalents at end of period | 5,460,000 | 10,363,000 |
Guarantor Subsidiaries [Member] | | |
Condensed Consolidating Financial Statements [Line Items] | | |
Net cash provided (used) by operating activities | -2,457,000 | -5,359,000 |
CASH FLOWS FROM INVESTING ACTIVITIES: | | |
Investment in property and equipment | -2,060,000 | -1,444,000 |
Proceeds from sales of assets | 0 | 8,703,000 |
Equity method investments | -1,177,000 | -98,000 |
Purchases of investments, employee benefit plans | -1,089,000 | -890,000 |
Proceeds from sales of investments, employee benefit plans | 925,000 | 281,000 |
Issuance of mezzanine and other notes receivable | | 0 |
Collections of mezzanine and other notes receivable | 0 | 0 |
Advances to and investments in affiliates | -35,000 | -2,314,000 |
Proceeds from Sale of Other Assets, Investing Activities | 1,592,000 | |
Other items, net | 0 | 0 |
Net cash provided (used) by investing activities | -1,844,000 | 4,238,000 |
CASH FLOWS FROM FINANCING ACTIVITIES: | | |
Net borrowings pursuant to revolving credit facility | 0 | 0 |
Principal payments on long-term debt | -177,000 | -174,000 |
Proceeds from contributions from affiliates | 0 | 0 |
Distributions to affiliates | 0 | |
Purchases of treasury stock | 0 | 0 |
Dividends paid | 0 | 0 |
Excess tax benefits from stock-based compensation | 4,473,000 | 1,024,000 |
Proceeds from exercise of stock options | 0 | 0 |
Net cash provided (used) by financing activities | 4,296,000 | 850,000 |
Net change in cash and cash equivalents | -5,000 | -271,000 |
Effect of foreign exchange rate changes on cash and cash equivalents | 0 | 0 |
Cash and cash equivalents at beginning of period | 25,000 | 569,000 |
Cash and cash equivalents at end of period | 20,000 | 298,000 |
Non-Guarantor Subsidiaries [Member] | | |
Condensed Consolidating Financial Statements [Line Items] | | |
Net cash provided (used) by operating activities | 7,337,000 | 6,371,000 |
CASH FLOWS FROM INVESTING ACTIVITIES: | | |
Investment in property and equipment | -32,000 | -212,000 |
Proceeds from sales of assets | 1,592,000 | 0 |
Equity method investments | -744,000 | -3,281,000 |
Purchases of investments, employee benefit plans | 0 | 0 |
Proceeds from sales of investments, employee benefit plans | 0 | 0 |
Issuance of mezzanine and other notes receivable | | 0 |
Collections of mezzanine and other notes receivable | 0 | 0 |
Advances to and investments in affiliates | 0 | 0 |
Proceeds from Sale of Other Assets, Investing Activities | 0 | |
Other items, net | 0 | 0 |
Net cash provided (used) by investing activities | 816,000 | -3,493,000 |
CASH FLOWS FROM FINANCING ACTIVITIES: | | |
Net borrowings pursuant to revolving credit facility | 0 | 0 |
Principal payments on long-term debt | -92,000 | -3,000 |
Proceeds from contributions from affiliates | 35,000 | 3,314,000 |
Distributions to affiliates | -1,592,000 | |
Purchases of treasury stock | 0 | 0 |
Dividends paid | 0 | 0 |
Excess tax benefits from stock-based compensation | 0 | 0 |
Proceeds from exercise of stock options | 0 | 0 |
Net cash provided (used) by financing activities | -1,649,000 | 3,311,000 |
Net change in cash and cash equivalents | 6,504,000 | 6,189,000 |
Effect of foreign exchange rate changes on cash and cash equivalents | -1,004,000 | 587,000 |
Cash and cash equivalents at beginning of period | 189,564,000 | 157,441,000 |
Cash and cash equivalents at end of period | 195,064,000 | 164,217,000 |
Eliminations [Member] | | |
Condensed Consolidating Financial Statements [Line Items] | | |
Net cash provided (used) by operating activities | 0 | 0 |
CASH FLOWS FROM INVESTING ACTIVITIES: | | |
Investment in property and equipment | 0 | 0 |
Proceeds from sales of assets | 0 | 0 |
Equity method investments | 0 | 0 |
Purchases of investments, employee benefit plans | 0 | 0 |
Proceeds from sales of investments, employee benefit plans | 0 | 0 |
Issuance of mezzanine and other notes receivable | | 0 |
Collections of mezzanine and other notes receivable | 0 | 0 |
Advances to and investments in affiliates | 35,000 | 3,314,000 |
Proceeds from Sale of Other Assets, Investing Activities | -1,592,000 | |
Other items, net | 0 | 0 |
Net cash provided (used) by investing activities | -1,557,000 | 3,314,000 |
CASH FLOWS FROM FINANCING ACTIVITIES: | | |
Net borrowings pursuant to revolving credit facility | 0 | 0 |
Principal payments on long-term debt | 0 | 0 |
Proceeds from contributions from affiliates | -35,000 | -3,314,000 |
Distributions to affiliates | 1,592,000 | |
Purchases of treasury stock | 0 | 0 |
Dividends paid | 0 | 0 |
Excess tax benefits from stock-based compensation | 0 | 0 |
Proceeds from exercise of stock options | 0 | 0 |
Net cash provided (used) by financing activities | 1,557,000 | -3,314,000 |
Net change in cash and cash equivalents | 0 | 0 |
Effect of foreign exchange rate changes on cash and cash equivalents | 0 | 0 |
Cash and cash equivalents at beginning of period | 0 | 0 |
Cash and cash equivalents at end of period | 0 | 0 |
Consolidated [Member] | | |
Condensed Consolidating Financial Statements [Line Items] | | |
Net cash provided (used) by operating activities | -15,835,000 | 5,264,000 |
CASH FLOWS FROM INVESTING ACTIVITIES: | | |
Investment in property and equipment | -6,804,000 | -3,015,000 |
Proceeds from sales of assets | 1,592,000 | 8,703,000 |
Equity method investments | -1,921,000 | -3,379,000 |
Purchases of investments, employee benefit plans | -1,089,000 | -890,000 |
Proceeds from sales of investments, employee benefit plans | 925,000 | 281,000 |
Issuance of mezzanine and other notes receivable | | -587,000 |
Collections of mezzanine and other notes receivable | 105,000 | 68,000 |
Advances to and investments in affiliates | 0 | 0 |
Proceeds from Sale of Other Assets, Investing Activities | 0 | |
Other items, net | -77,000 | -154,000 |
Net cash provided (used) by investing activities | -7,269,000 | 1,027,000 |
CASH FLOWS FROM FINANCING ACTIVITIES: | | |
Net borrowings pursuant to revolving credit facility | 20,700,000 | 15,000,000 |
Principal payments on long-term debt | -3,082,000 | -2,052,000 |
Proceeds from contributions from affiliates | 0 | 0 |
Distributions to affiliates | 0 | |
Purchases of treasury stock | -6,227,000 | -4,530,000 |
Dividends paid | -11,710,000 | -10,784,000 |
Excess tax benefits from stock-based compensation | 4,473,000 | 1,024,000 |
Proceeds from exercise of stock options | 5,619,000 | 1,547,000 |
Net cash provided (used) by financing activities | 9,773,000 | 205,000 |
Net change in cash and cash equivalents | -13,331,000 | 6,496,000 |
Effect of foreign exchange rate changes on cash and cash equivalents | -1,004,000 | 587,000 |
Cash and cash equivalents at beginning of period | 214,879,000 | 167,795,000 |
Cash and cash equivalents at end of period | $200,544,000 | $174,878,000 |